Getting frequent mouth ulcers need to be addressed with proper investigations and diagnosis. Ulcers never always due to lack of vitamins. Over taking of any particular
vitamin leads to hyper-vitaminosis which is dangerous in further. Having fungal infection on the foot means you are immuno-compromised ( less immunity than normal). Pertaining to oral ulcers, several reasons for occurrence are there other than lack of vitamins. Detecting the reason and targeted therapy will cure your problem.